'Sun' in the Bible

The sun will become dark and the moon will be turned to blood, before that great day of the Lord comes in glory:

And now, see, the hand of the Lord is on you, and you will be blind and not able to see the sun for a time. And straight away a dark mist came down on him; and he went about looking for a guide.

In the middle of the day, on the road I saw a light from heaven, brighter than the sun, shining round me and those who were journeying with me.

And as we had not seen the sun or stars for a long time, and a great storm was on us, all hope of salvation was gone.